Originally Posted by
PeteHski
Me neither. For me 85% of my 5 min power would be nearly a 10% over-estimate of my FTP.
Mine has been as low as 82% and as high as 87.9%, depending on training
Alex Simmons has an interesting chart on his blog. Either OP's power meter is wonky as you suggested or he simply needs to train his legs, which is why I think is going on. Low efficiency. He needs miles.
http://4.bp.blogspot.com/